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• Do Not Sand: Never use sandpaper or steel wool on gold-plated pins! You will strip the plating off entirely.
• Mild Abrasive: For stubborn tarnish, you can use a very fine Scotch-Brite pad or a pencil eraser very gently, then clean with alcohol.
• Prevention: Green corrosion usually means the connector was unmated while wet. Always rinse and dry before storage.